The Chapman-Cycle

class date Worksheet Higher Atmospfere (Stratosphere) No.____ Ozone: formation & destruction name

The Chapman-Cycle Ozone is created and destroyed in the stratosphere. The English mathematician and geophysicist, Sidney Chapman, investigated and described this cycle. Because of his work, the cycle is called the "Chapman-Cycle". T1 Add the missing words to the text. The missing words are: ozone molecule ; ozone molecules; cracking of ozone; oxygen atom ; oxygen atom; oxygen atoms; oxygen atoms; oxygen molecule ; oxygen molecule; oxygen molecule; oxygen molecules; UV-light ; UV-light; energy; energy; wavelength 1) High-energy (short wave) ultra-violet radiation can crack (breakdown) ______into ______. 2) If an ______, an ______and a heavy weight particle impact in a “triple collision”, a ______is formed. The heavy weight particle can be a dust particle, or another big gas molecule such as nitrogen gas. 3) The heavy weight particle absorbs the ______which becomes free during the ozone formation reaction. It delivers the ______slowly to the environment afterwards. 4) ______can be broken down similarly by ______. The ______needed by this do not need to have as much energy as they do to breakdown oxygen molecules into oxygen atoms. The ______can be larger. The products of this ______are an ______and an______. 5) When two ______collide, an ______is formed.

T2 Explain briefly which form of energy in the stratosphere is converted to warmth by the Chapman-Cycle.